A rich body of knowledge spans organizational topics relevant to the practice, conceptual development and planning of social work health care services. At a time when health care organizations are experiencing major changes in their structure and financing; organizational research informs both the system adjustments and leadership which social work can offer the health care field. Organizational research on health care social work is grouped into three categories: management and administrative issues; interprofessional and interorganizational relations; and service delivery topics. Within each category, the major issues are presented with single site and multi-site research reviewed. Recommendations to improve the contributions of this body of research include greater attention to methodological rigor in designing and implementing research projects.